Performance Matters

Tag: uarch

Jun 17, 2021
Your CPU May Have Slowed Down on Wednesday
The death of hardware store optimization.
May 26, 2020
AVX-512 Mask Registers, Again
Taking a second look at the newly introduced mask registers, this time with the benefit of a SKX die shot from Fritzchens Fritz.
May 18, 2020
Ice Lake Store Elimination
We look at the zero store optimization as it applies to Intel's newest micro-architecture.
May 13, 2020
Hardware Store Elimination
Probing a previously undocumented zero-related optimization on Intel CPUs.
Jan 17, 2020
Gathering Intel on Intel AVX-512 Transitions
Investigating some details of SIMD related frequency transitions on Intel CPUs.
Dec 5, 2019
A Note on Mask Registers
Some mostly too-low-level-to-care-about hardware details of the mask registers introduced in AVX-512.
Nov 19, 2019
Clang-format Tanks Performance
Can using clang-format make your code slower? Kind of.